openssh client
There is a pkcs11 patch for the openssh client provided by Alon Bar-Lev.
The patch enables the client to use the RSA private key from the eToken.
Unfortunately there is no timeline, when this pkcs11 patch will be merged into the openssh tree.
Please download the patch directly from Alons website and follow his instructions.
When you have patched the openssh source, you can login this way:
eval './ssh-agent xterm -s' ./ssh-add --pkcs11-ask-pin /home/koelbel/openssh-kde-dialogs.sh ./ssh-add --pkcs11-add-provider --pkcs11-provider /usr/local/lib/libetpkcs11.so ./ssh-add --pkcs11-add-id --pkcs11-slot-type id --pkcs11-slot 0 --pkcs11-id-type label --pkcs11-id NEU
interoperability
Often you got you not only would like to login to your linux server from your linux client but also from a windows machine. Take a look here: http://www.joebar.ch/puttysc/.